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研究生： 謝文豪
Wen-hao Hsieh
論文名稱： 從米糠中利用兩步驟原位點轉脂化法生產生質柴油
Biodiesel production from rice bran by two steps in-situ transesterification process
指導教授： 朱義旭
Yi-Hsu Ju
口試委員: 曾文祺
Wen-Chi Tseng
蘇亞迪
Suryadi Ismadji
學位類別： 碩士
Master
系所名稱： 工程學院 - 化學工程系
Department of Chemical Engineering
論文出版年： 2009
畢業學年度： 97
語文別： 英文
論文頁數： 82
中文關鍵詞： 生質柴油 、米糠 、兩步驟原位點轉脂化法
外文關鍵詞： biodiesel, rice bran, two steps in-situ transesterification
相關次數： 點閱：224  下載：4 
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    • 這個研究是利用兩步驟原位點轉脂化法從兩種不同成份的米糠中生產脂肪酸甲基脂(FAME)。這個方法是先進行酸催化原位點脂化反應接著直接進行鹼催化轉脂化反應。在第一步驟中，米糠中的游離脂肪酸含量會從3%(米糠A)和30%(米糠B)減少到低於1%，其最適化反應條件為:米糠10g，甲醇150 ml，硫酸對米糠的重量百分比為18.4%，反應溫度60 ℃，攪拌速度600 rpm，反應時間15 分鐘。接下來，直接進行第二步驟來轉換第一步驟的反應混合物變成脂肪酸甲基脂(FAME)，其最適化反應條件為: 5N氫氧化鈉甲醇溶液8ml，反應溫度60 ℃，攪拌速度600 rpm，反應時間各為60(米糠A)和30 (米糠B)分鐘。最後的脂肪酸甲基脂(FAME)產率為97%在總反應時間各為75(米糠A)和45(米糠B)分鐘

    The production of fatty acid methyl ester (FAMEs) from two kinds of rice bran was investigated in this study by two-steps in-situ transesterification. The method is in-situ acid-catalyzed esterification directly followed by in-situ base-catalyzed transesterification. FFAs level was reduced from 3 in rice bran A and 30 wt% in rice bran B to below 1 wt% in 1st step which the optimum conditions are: methanol of 150 ml, H2SO4 to rice bran mass ratio of 18.4%, temperature of 60 ℃, stir rate of 600 rpm for 15 min. After that, 2nd step was employed on the product of 1st step to convert into FAMEs which the optimum condition are: 5N NaOH solution of 8 ml for 60 and 30 min. Highest FAMEs yields of 97% were finally obtained at total reaction time of 75 (rice bran A) and 45 (rice bran B) min, respectively.

    TABLE OF CONTENTS Page COVER RECOMMENDATION LETTER I APPROVAL LETTER II CHINESE ABSTRACT III ENGLISH ABSTRACT IV ACKNOWLEDGMENTS V TABLE OF CONTENTS VI LIST OF ABBREVIATIONS IX LIST OF FIGURES X LIST OF TABLES XII CHAPTER 1 INTRODUCTION 1 1.1Biodiesel 1 1.2 Rice bran 4 1.3 Biodiesel production 6 1.3.1 Transesterification 6 1.3.2 Esterification 8 1-3.3 Two-steps process 9 1-3.4 In-situ process 9 1-4 Objectives 10 2 LITERATURE SURVEY 11 2-1 Crude Oils 11 2-1.1 Acid Liquid Catalyst 11 2-1.2 Acid Solid Catalyst 12 2-1.3 Two-step Process 13 2-2 Refined Oils 14 2-2.1 Base Liquid Catalyst 14 2-2.2 Base Solid Catalyst 14 2-2.3 Enzyme Catalyst 15 2-2.4 Supercritical Alcohol 16 2-3 Oil seed 17 2-3.1 In-Situ Acid Esterification 17 2-3.2 In-Situ Base Transesterification 18 2-3.3 In-Situ Supercritical Transesterification 19 3 MATERIALS AND METHODS 20 3-1 Materials 20 3-2 Equipments 20 3-3 Methods 23 3-3.1 Preparation of materials 23 3-3.2 Extraction of crude rice bran oil 24 3-3.3 Converting of rice bran oil into FAME 24 3-3.4 Two-step in-situ production of FAMEs (biodiesel) from rice bran 25 3-3.5 TLC (Thin layer chromatogram) analysis 28 3-3.6 HT-GC analysis 30 3-3.7 Determination of FAME contents 30 3-3.8 Statistical analysis 31 4 RESULTS AND DISCUSSION 32 4-1 In-situ acid-catalyzed esterification 34 4-1.1 Effect of methanol amount to rice bran (v/w) 34 4-1.2 Effect of the 1st step reaction time (t1) 37 4-1.3 Effect of acid amount to rice barn (w/w) 38 4-2 In-situ base-catalyzed transesterification 41 4-2.1 Effect of base amount 41 4-2.2 Effect of reaction time (t2) on rice bran with different FFAs contents 42 4-3 Comparison of one-step and two-steps in-situ for producing biodiesel 44 5 CONCLUSIONS 46 REFERENCE 47 APPENDIX A APPENDIX B AUTHOR PROFILE COPY RIGHT

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